Spin Polarization Dependence of the Coulomb Drag at Large $r_s$

Abstract

We find that the temperature dependence of the drag resistivity (${\rho }_D$) between two dilute two-dimensional hole systems exhibits an unusual dependence upon spin polarization. Near the apparent metal-insulator transition, the temperature dependence of the drag, given by $T^{\alpha }$, weakens with the application of a parallel magnetic field ($B_{||}$), with $\alpha$ saturating at half its zero field value for $B_{||}>B^{\ast }$, where $B^{\ast }$ is the polarization field. Furthermore, we find that $\alpha$ is roughly 2 at the parallel field induced metal-insulator transition, and that the temperature dependence of ${\rho }_D/T^2$ at different $B_{||}$ looks strikingly similar to that found in the single layer resistivity. In contrast, at higher densities, far from the zero field transition, the temperature dependence of the drag is roughly independent of spin polarization, with $\alpha$ remaining close to 2, as expected from a simple Fermi liquid picture.

arXiv comment4 pages, 5 figures

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Cited by in corpus (5)

• Coulomb drag
• Coulomb Drag and Spin Coulomb Drag in the presence of Spin-orbit Coupling
• In-plane magnetodrag in dilute bilayer two-dimensional systems: a Fermi liquid theory
• Finite-thickness effect and spin polarization of the even-denominator fractional quantum Hall states
• Spin mechanism of drag resistance in strongly correlated electron liquids